METHOD FOR LIQUID-PHASE CATALYTIC ALKYLATION OF ANILINE Russian patent published in 2006 - IPC C07C211/48 C07C209/26 B01J23/44 B01J35/04 

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a liquid-phase catalytic method for preparing alkylated aniline used as additive to gasoline for elevating its octane number. Method involves alkylation of aniline with formalin in the ratio aniline : formalin = 1.6 : 1.1 in the presence of hydrogen and fixed palladium catalyst in ethyl or methyl alcohol at temperature 55-65°C and under pressure 0.2-0.4 MPa. The process is carried out in the cylindrical reactor fixed with a rocker with rocking number 120-160 min^-1 wherein in its mean part the porous block cellular palladium catalyst is placed and this catalyst comprises an active layer modified with palladium nanoparticles with porosity value 70-95% and the palladium content 1.8-3.7%. In this process hydrogen is fed through a connecting pipe of reactor lid. Method provides declining energy consumption and to decrease part of by-side substances.

EFFECT: improved alkylating method.

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